It seems that there are dozens of Cornelius Driscolls from Co. Cork. I noted one which might be your, from the baptisms of the RC parish, Dunmanway, Co. Cork:
27 May 1821, Cornelius, s/o Cornelius O’Driscoll and Judy McCarthy, Ballyhal---; godparents Denis Leyne and Judy Riordan
There is another baptism at the same church - 3 May 1826, Cornelius, s/o Cornelius Driscoll and Johanna Denahoughe, res. Kilronan; godparents Cornelius Denahoughe and Catherine Butler
- but this one is my ancestor, who married Mary Duggan at Dunmanway on 17 Nov. 1850.